Granulating slag.



A. SEGHERS.

GRAN ULATING SLAG. v APPLICATION FILED FEB. 9, 1909.

Patented Nov. 7,1911.

UNITED STATES PATENT oEEIoE.

ADOLPHE SEGHERS, or PARIS, FRANCE, ASSIGNOR T0 PYROTRASS socIETIJ ANONYME POUR LA FABRICATION nu TRASS ARTIFICIAL (BREVETE) ET SES APPLI- CATIONS INDUSTRIELLES, or PARIS, FRANCE.

GRANULATING SLAG.

Specification 0 Application filed February fletters Patent. Patented Nov. '7, 1911.

9, 1909. Serial No. 476,986.

To all whom it may concern:

Be it known that I, ADoLPHE SEcIIERs, of Paris, France, have invented certain new and useful Improvements in Granulating Slag, of which the following is a specification.

This invention relates to a process and apparatus for granulating and solidifying s ag.

The process consists essentially in causing the liquid slag to fall continuously in a thin and uniform sheet in front of one or more jets of fluid under pressure, such jet or jets being sufficiently powerful to determine the subdivision of the slag into granules of more or less small diameter.

The process as defined above suflices when it is possible to allow the subdivided slag to fal through a suflicient distance to insure that the granules will be thoroughly cooled before they have time to agglomerate again. When, however, the height available is comparatively small, it is necessary to complete the action of the jet or jets by that of a rotating fan provided with blades which project the already formed granules on to a conveyer which conveys them to and discharges them into a wagon. The granules should not be allowed to fall directly upon the conveyer. They may be first received upon inclined planes suitably sprinkled with water which may also serve to wash them down on to the conveyer.

The general arrangement and the operation of an installation of this kind will be gathered from the accompanying drawings, in which- Figure 1 is a diagrammatic representation of the whole installation, and Fig. 2 is a front view of a part thereof. Fig. 3 is a vertical section through a modification of the a paratus for producing a sheet of slag.

Re erring to Figs. 1 and 2, the slag flowdown the channel A spreads itself in the form of a sheet in front of the jets proceeding from a twyer B which is composed of two or more tubes as may be necessary arranged parallel to each other (Fig. 2).

Through this twyer is discharged a fluid under pressure, such as water under a head, or steam or air under pressure, and for this purpose the tubes are provided with perforations a arranged along a straight line so that the jets may entrain the surrounding air giving an atomized spray. The lower end of the channel A down which the slag flows is fan-shaped, as shown in Fig. 2, and is more steeply inclined than the rest of the channel for the purpose of allowing the slag to acquire a higher speed as it leaves the channel. The thin 'layer, the thickness of which is uniform throughout the width of the channel, falls as vertically as may be toward the jets of fluid proceeding from the tubes of the twyer.

In order that the slag may retain its fluidity and may have a temperature as constant as possible, there may be substituted for the channel A a vessel. m (Fig. 3) having a discharge opening 3 through which the slag is discharged in the form of a sheet. The

maintained at a very high temperature by the combustion of a suitable gas under pressure in cells Z, the burned gages escaping through the outlets z in such a manner that they encounter the jets proceeding from the twyer.

Z is a pipe for introducing the combustible mixture. p

The tubes constituting the twyer may be varied in number as may be desirable, and they may be fed by separate pipes or by a single pipe branched to the several tubes.

Below and in front of the mouth of the channel A and also below the twyer, is situated a fan rotating in the direction of the arrow f and having blades G constructed of slats spaced apart. This fan, in combination with the twyer B, projects into space those granules which fall too rapidly. In front of the fan is a certain number of planes D inclined toward a conveyer E running over an upper drum F and a lower drum G. The periphery of the latter is unmersed in water in a vat H so as to cool the conveyer, which may be a metallic band. Each of the inclined planes D is supported at its higher end .upon a tube I perforated at the lowest part of its periphery, so that water flowing along it rains down on to the plane immediately beneath. The lowest of these pipes serves similarly to sprinkle an inclined plane J from which the vat H is supplied with water and upon which any sufiiciently far to fall upon the other planes -may be collected.

granules which may not have been projected The material which falls upon the several inclined planes D descends on to the con veyer E by which it is conveyed to and discharged into a wagon W.

The essential feature of the installation is the twyer, which acts directly, immediately, and suddenly upon the sheet of slag descending from the channel A. The fan, the inclined planes, and the conveyer are accessories which are particularly useful and have a certain eflect when there is not sufiicient space to,,a]low of a considerable 'fall of the granules of slag scattered into space by the powerful force of the steam or other fluid forced under pressure from the twyer. The

jet issuing from the twyer preferably meets the sheet of slag at an angle of approximately 90, as illustrated in Fig. 1, though the twyer may be arranged so that the jets issuing therefrom may meet the sheet of sla at greater or less angles which ermit of its acting to granulate the slag. n Fig. 3, for instance, the twyer is so arranged that the jet issuing therefrom meets the sheet of slag at an angle somewhat less than 90.

The whole apparatus described above may be inclosed at the sides by sheet iron parti- 'tions for the pur ose of preventing granules of; subdivided s ag from being projected laterally.

Having thus described the nature of my said invention and the'best means I know prising a slag receptacle provided with double lower and front walls anda thin fanlike outlet passing outwardly between said double Walls, and means for maintaining the double walls at very high temperature.

2. In apparatus for granulating slag, a slag receptacle having a narrow fan-like outlet, in combination with gas chambers provided with a gas inlet and outlets, the gas outlets being so directed as to meet the outcoming slag at an angle.

3. Apparatus for granulating slag, comprising a slag receptacle having a narrow fan-like outlet, the walls of the receptacle being formed of chambers adapted to contain gas under pressure and at a high temperature, the said chambers being provided with inlet and outlet pipes, the gas outlet pipes being so directed as to deliver the high temperature gas under pressure at an angle vto the outflowing slag.

4. A process for granulating. slag, which consists in inclosing the slag in a receptacle, maintaining the temperature of the slag very high by combustion of as under pressure, and directing the burned against the outflowing slag.

'In witness whereof, I have hereunto si ed my name in the presence of two subscri ing witnesses.

, Anorrnn snennn s. Witnesses ELLwoon Ausrm Wnnunn, GABRIEL Bnmnnn.

gases at an angle 

